Since you mentioned this in your OP- maybe they come to school smelling like urine and you just don't realize it b/c you are accustomed to your home's smell? Just a thought.

This is a good point. When I taught Head Start we had to call DCFS on a set of twins who came to school every day smelling very strongly of ammonia. They were unkempt and dirty, and in addition to these things, we could never get appointments to get in the house (as teachers we were supposed to do two home visits a year and the family service workers were supposed to visit monthly). There was some concern about possible meth use/production in the home... I definitely didn't ever call DCFS to get parents in trouble, I just was concerned with helping those sweet kids, but as mandatory reporters if there was every any concern, no matter how small, we had to call. I hope everything works out for the best for you and your children!